NumberResearchRecent thousands-block assignments
12 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 317
New assignments by month
Sep 2026
Aug 2026
Jul 2026
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Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2003-02-10 | 317-497-6XXX | 6000–6999 | Assigned | INDIANA BELL TEL CO INC | 9325 | GREENWOOD | IN |
| 2003-02-06 | 317-225-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | INDIANAPLS | IN |
| 2003-02-06 | 317-225-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | INDIANAPLS | IN |
| 2003-02-06 | 317-225-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | INDIANAPLS | IN |
| 2003-01-31 | 317-732-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | ZIONSVILLE | IN |
| 2003-01-23 | 317-223-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-23 | 317-223-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-23 | 317-223-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-23 | 317-223-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-23 | 317-223-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-23 | 317-223-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-23 | 317-223-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | INDIANAPLS | IN |
| 2003-01-07 | 317-215-3XXX | 3000–3999 | Assigned | AT&T - LOCAL | 7421 | GREENWOOD | IN |
| 2002-10-31 | 317-412-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN | 6725 | FRANKLIN | IN |
| 2002-10-31 | 317-412-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN | 6725 | FRANKLIN | IN |
| 2002-09-27 | 317-561-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IN | 7314 | PLAINFIELD | IN |
| 2002-08-28 | 317-376-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IN | 4803 | CICERO | IN |
| 2002-08-06 | 317-537-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | FISHERS | IN |
| 2002-08-06 | 317-537-4XXX | 4000–4999 | Assigned | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | FISHERS | IN |
| 2002-08-06 | 317-537-5XXX | 5000–5999 | Assigned | LEVEL 3 TELECOM OF INDIANA, LP - IN | 7060 | FISHERS | IN |
| 2002-06-04 | 317-615-3XXX | 3000–3999 | Assigned | INDIANA BELL TEL CO INC | 9325 | INDIANAPLS | IN |
| 2002-04-04 | 317-361-4XXX | 4000–4999 | Assigned | ONVOY, LLC - IN | 097D | INDIANAPLS | IN |
| 2002-03-28 | 317-399-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IN | 7314 | WESTFIELD | IN |
| 2002-03-15 | 317-642-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - IN | 7314 | SHELBYVL | IN |
| — | 317-436-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - IN | 4803 | FISHERS | IN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.